11210111111221 has 16 divisors (see below), whose sum is σ = 13000308897600. Its totient is φ = 9559050624000.

The previous prime is 11210111111201. The next prime is 11210111111341. The reversal of 11210111111221 is 12211111101211.

It is a cyclic number.

It is not a de Polignac number, because 11210111111221 - 2¹¹ = 11210111109173 is a prime.

It is a super-2 number, since 2×11210111111221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11210111111195 and 11210111111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11210111111201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265508076 + ... + 265550293.

It is an arithmetic number, because the mean of its divisors is an integer number (812519306100).

Almost surely, 2^{11210111111221} is an apocalyptic number.

11210111111221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11210111111221 is a deficient number, since it is larger than the sum of its proper divisors (1790197786379).

11210111111221 is a wasteful number, since it uses less digits than its factorization.

11210111111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531058500.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 11210111111221 its reverse (12211111101211), we get a palindrome (23421222212432).

The spelling of 11210111111221 in words is "eleven trillion, two hundred ten billion, one hundred eleven million, one hundred eleven thousand, two hundred twenty-one".